Previews - Do you like it big or small?

So i’ve been thinking about the previews. I’ve seen some previews which are very detailed to the point and a lot of examples have been given in them. But the are biiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiig
So it sometimes annoy me when they don’t finish loading even after minutes.. What do you think about it? Do you make your ones big or small?